The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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Name:	us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Real Estate Investments, Net - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) property	Jun. 30, 2019 USD ($) property	Jun. 30, 2020 USD ($) property	Jun. 30, 2019 USD ($) property	Dec. 31, 2019 property
Real Estate [Line Items]
Gain (loss) on dispositions of real estate investments \| $	$ (153)	$ 6,923	$ (153)	$ 7,815
Number of real estate properties held for sale			0		0
Properties Sold
Real Estate [Line Items]
Number of real estate properties sold	0		0
Proceeds from dispositions of real estate investments, gross \| $		83,300		92,800
Gain (loss) on dispositions of real estate investments \| $		$ 6,900		$ 7,800
United States
Real Estate [Line Items]
Number of real estate properties sold		63		64
United States \| Family Dollar
Real Estate [Line Items]
Number of real estate properties sold		62		62
United States \| Industrial Property
Real Estate [Line Items]
Number of real estate properties sold		1		2
UNITED KINGDOM
Real Estate [Line Items]
Number of real estate properties sold		1		1